Guard support for ophthalmic mountings



w. c. KRAPP GUARD SUPPORT FOR OPHTHALMIC MOUNTINGS Filed Sept. 14, 1939Patented Oct. 7, 1941 Q/GUARDSUPPQRT FOR OPHTHALMIC. T

- OUNTINGS.

; Walter Krapp,v Rochester, N. assignor to -'Sl 1uron---0ptical,Company, Inc.,

Rochester, v

N.Y.,acorporationof NewIZork TY: V I v I lipplication september 14,1939; Serial No. 294,380 j 2 Claims.

My present inventionrelates to optics and more particularly toophthalmic mountings, and it has for its general object to provide aneye glass of this character,which totthe advantage of the wearer and theconvenience of the practitioner is so constructed that the guards ornose pads can be perfectly adjusted with reference to the saddling ofsuch nose pads or guards upon the nose to give a maximum opticalefficiency. The improvements are directed in part to'saddling ophthalmicmountings whose optical centers do not agree with the geometricaloutlines thereof in such way that the final adjusted mounting will beoptically perfect. In iother words, the idea is toprovide,guardswith"nose-pads that will support the eye y glass}; lenseson proper centers, and at the .sam'e time'preservethe desired outwardappearances. The'improvements are furtherrdirected to a specificarrangement for the pivotal mounting of the guard or pad on the arm thathas certain manufacturing advantages, including that of assembly, andfurther advantage of promoting ease in the attachment and detachment ofthe guards or nose pads for purposes of repair or substitution.

To these and other ends, the invention resides in certain improvementsand combinations of parts, all as will be hereinafter more fullydescribed, the novel features being pointed out in the claims at the endof this specification.

' In the drawing:

Figure l is a front elevation of an ophthalmic mounting constructed inaccordance with and illustrating one embodiment of my invention;

Figure 2 is a top plan View thereof with respect to the bridge and nosecontacts except that it is taken on the horizontal section through thelenses on line 2-2 of Figure 1;

Figure 3 is an enlarged longitudinal section through the nose pad itselfin detail;

Figure 4 is a View on the same scale in section through the guard armbut showing the nose pad assembled from the opposite side of the nasalwall;

Figure 5 is a side enlarged View of the manner in which such pad isassembled with the guard arm and the pivot thereof, the arm being shownspread for preliminary purposes;

Figure 6 is a View corresponding to that of Figure 5 and on the samescale but showing the nose pad pivotally locked on the guard arm forultimate use;

Figure 7 is a perspective view on the scale of Figures 5 and 6 showing adetail of the guard arm pintle constructionfor the mounting of the nosepad; i Fi e ure 6;; d

Figure 9 is a section through a lens of the mounting showing theguardarm and nose pad in side elevation on the line" 9 -'9 of Figure 1;

Figure i0 is a, detail section on the scale of Figures-5 to t} showing amodified construction of the mounting of thenose pad on the guard m d AFigure, 11 is a side view corresponding to that of Figure-6 of the samemodification of Figure 10. Similar reference numerals "throughout theseveral views indicate thesameiparts.

in section'on the line 8 -8 of Fig In the construction of ophthalmicmountings of the, typefillustrated it"iarecent' practice to attach bymeans of lens connections l to' the lenses 2, hinged temples 3 that goback to the ears of the wearer and proceed from an elevated point ofattachment on the said lenses as indicated in Figures 1 and 9. This isfor the general purpose of giving wide lateral vision withoutobstruction by the temples. Also, in this type of mounting the opticalcenters of the lenses often do not coincide with the geometrical centersthereof being higher than the latter as indicated at 4 in Figure l. Thenet result of this is that the mounting, otherwise suitable, must beraised in its saddling upon the nose. In other words, the guards or nosepads must be dropped below the usual position with respect to the lensconnections. With the present invention this is accomplished inconnection with a novel pivotal mounting of the guards upon the guardarms.

Referring further more particularly to the drawings, 5 indicates thelens straps, 6 the edge straps, and I, the bridge of an eyeglassmounting. Each guard arm 8 proceeds from a point intermediate of theserearwardly and outwardly and horizontally, is thence looped at 9, whichaids in the usual pliable adjustments and such arm thence proceedsforwardly and downwardly to an ultimate substantially vertical positionat l0. It thereupon terminates in a bifurcation constituted in thepresent instance by a yoke l I having the parallel separated arms l2.For advantage in manufacture this yoke H, in the present embodiment, isa separate piece of material formed with a central saddle l3 in itsconnecting portion, in which the guard arm having the cross sectionindicated is seated and then soldered or welded in a fused integraljoint.

In the form of the invention illustrated, particularly in Figures 4 to8, the arms I2 of the yoke or bifurcation ll of the guard arm as a wholejointly carry a transverse pintle M. In that embodiment the pintle isdiscontinuous being divided into two parts, one of which is carried oneach arm. Turning on this pintle is the guard or nose pad 15 whichincludes a metallic core Hi to which is aflixed to project from theouter or counternasal side a tubular knuckle 11. By this means the guardadjusts itself to the tapering conformation of the nose and by theadjustability of the arm 8 and loop 9 in general it is carried towardand from it.

A feature of the invention resides in the assembly of this guard andsupporting arm combination. The yoke H, in the original attachment ofthe guard arm has its own arms l2 spread as in Figure so that the pintleelements I4 are separated. To apply the guard, all that is required isto insert its knuckle I! within the yoke as indicated in the samefigure, pinch the arms [2 together and the assembly is complete. Thearms being of a pliable nature consistent with ultimate rigidity so faras the secure application of the guard is concerned, it is obvious thatfor purposes of cleaning, substitution or repair the arms may be spreadapart from the position of Figure 6 to that of Figure 5 to release theguard knuckle and subsequently restore it.

In the modification shown in Figures 10 and 11 the pintle indicated at Ila is continuous and carried solely by one of the arms I2. In this formthe opposite arm l2a is distorted laterally with reference to the planeof the yoked bifurcation as indicated in Figure 10 to permit applicationand removal of the guard knuckle II, it not being feasible in thisinstance to spread the arms l2 and I2a in the former mannersufi'iciently to provide clearance for slipping the knuckle over thesingle or continuous pintle.

In both embodiments of the invention a feature of extending the arms l2downwardly beyond the pintle is to control the amplitude of the rockingmovement of the guard. By dishing the yoke or bifurcation l l asindicated in dotted lines in Figure 8 to a greater or less degree, suchrocking movement can be controlled with the knuckle [1 still close tothe outer surface of the guard and nose pad l5, as shown in Figure 3.

A collateral advantage of the principal of construction herein involvedis that in both original manufacture and assembly and for repair ordisassembling purposes a spanner or special tool is provided to engagein manipulating the arms I2 between the positions of Figures 5 and 6.

I claim as my invention:

1. In an ophthalmic mounting, the combination with a guard arm having avertically disposed portion terminating in a bifurcation to form adownwardly opening yoke comprising a pair of separate parallel arms ofuniform width and pliability, said arms being provided with a transversesubstantially horizontal pintle, and a guard having a knuckle turningloosely substantially vertically on the pintle, the pintle beingdiscontinuous and partially fixed to both arms so that the knuckle maybe attached and removed by spreading both arms.

2. In an ophthalmic mounting, the combination with a pair of side armsof substantially equal width and pliability connected by a yoke portionand having a supporting guard arm connected thereto centrallysymmetrically of the yoke portions, one of the side armsat anintermediate point being provided with a transverse pintle extendingtoward the other in the plane of both arms, of a guard having a knuckleturning loosely on the pintle to be released and secured by thespreading and contraction of the arms from and toward each other,respectively.

WALTER C. KRAPP.

